Portable metallic trestle.



C. H. DOERR.

PORTABLE METALLIC TRESTLE.

APPLIOATION FILED 00114, 1912.

Patented May 19, 1914.

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COLUMBIA PLANOGRAPH c0., WASHINGTON. D. C.

U N ITED STATES PATENT OFFICE.

CHARLES H. DOERR, OF OMAHA, NEBRASKA, ASSIGNOR T0 STERLING- I-I. CAMPBELL, OF ST. LOUIS, MISSOURI.

PORTABLE METALLIC TRESTLE.

To all whom it may concern Be it known that 1, CHARLES H. Donna, a citizen of the United States, residing at Omaha, Nebraska, have invented a certain new and useful Improvement in Portable Metallic Trestles, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, ref erence being had to the accompanying drawings forming part of this specification, in Which Figure 1 is an elevation of my invention with portions broken away to show details of the structure. Fig. 2 is a fragmentary horizontal section taken on the line 2 2. Fig. 3 is a fragmentary plan View of the top of the trestle.

My invention relates to portable metallic trestles designed primarily for machine shop use, and has for its principal purpose the construction of a trestle of light weight such as adapts it to being carried from place to place by hand, and at the same time of great strength which permits its being used for supporting very heavy structures.

A further object of my invention is to provide a trestle possessing the qualities aforementioned, which may be constructed almost entirely of stock material and at small cost.

By reference to the drawings, it will be seen that my trestle comprises a body portion 1, which is formed of sheet metal having the proper degree of rigidity, and which is rolled into frusto-conical form. At the larger base of the body portion 1 is secured an angle iron 2 which is bent about the body portion and has one of its flanges secured thereto in a suitable manner. Secured in a suitable manner to the other flange of the angle iron 2 is a circular base 4 of sheet metal. The cap 5 having a table portion 6 and an annularly depending flange 7 is secured at the upper end of the body portion 1. This cap is made of material suitable to form a bearing surface for supporting the work, and is preferably knurled or rough- V Specification of Letters Patent.

Application filed October 14, 1912.

Patented May 19, 1914. Serial No. 725,674.

ened in some manner so as to retain the Work against slipping. This cap is preferably formed of such size that its annular flange 7 will fit snugly over the upper end of the body portion 1, where it may be riveted in place or secured by other means, or may be detachably held by pins.

Oppositely in the sides of the body portion 1 are formed openings 8 about which the body portion 1 is suitably strengthened by suitable reinforcing means. These openings 8 afford means whereby the trestle may be grasped to be lifted and carried from place to place, or a crowbar or other suitable shaft may be thrust through them and the trestle carried thereon.

The trestle above described is designed particularly for use in car and locomotive shops where very heavy structures must be supported above the floor upon supporting members which take up a minimum amount of space when in use, and which may be easily and quickly shifted and carried about.

The structure above described produces a trestle having a maximum amount of strength and a minimum amount of size and weight.

' I claim:

As a new article of manufacture, a portable metallic trestle comprising a substantially conical sheet metal body portion provided with a perforation having a reinforced edge to afford a hand hold, a work support in the form of a cap piece having a depending flange embracing the upper end of the body portion and secured thereto, and a base plate connected to the lower end of the body portion by means of an angle member secured thereto and to the body portion; the same forming a self-sustaining structure.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses, this 8th day of October, 1912.

CHARLES H. DOERR.

Witnesses JAS. T. BARRETT,

PHILIP N. BIGGER.

Copies of this patent may be obtained for five cents each, by addressing the (iommissioner of Patents, Washington, D. G. 

